The Brazilian version of the 5-item Work Role Functioning Questionnaire 2.0 (WRFQ-5) has adequate measurement...

To assess the reliability, internal consistency, structural validity, and construct validity of the Work Role Functioning Questionnaire 2.0 with 5 items (WRFQ-5) in Brazilian workers with chronic pain.

This was a questionnaire validation study. Workers with chronic pain, both genders, and age ≥18 years were included. We assessed the internal structure of the WRFQ-5 using exploratory factor analysis (EFA). To assess construct validity, we correlated the WRFQ-5 with the short version of the Orebro Musculoskeletal Pain Screening Questionnaire (OMPSQ). In addition, we assessed test-retest reliability, internal consistency, and floor and ceiling effects.

We included 153 workers with chronic pain for analysis of internal structure and construct validity, and a subsample of 43 for analysis of test-retest reliability. We identified the unidimensionality of the WRFQ-5 by means of EFA with implementation of parallel analysis (KMO = 0.77 and p < 0.001for Bartlett's test of sphericity). Regarding construct validity, we confirmed the hypothesis by observing a negative correlation with magnitude lower than 0.30 (unrelated constructs) between the WRFQ-5 and the OMPSQ. We found substantial reliability (ICC = 0.79) and adequate internal consistency (Cronbach's alpha = 0.88). No ceiling or floor effects were observed.

The Brazilian Portuguese version of the WRFQ-5 demonstrates adequate measurement properties for use in workers with chronic pain.